1 /* Generic video mixer plugin
4 * Copyright (C) 2009 Julien Isorce <julien.isorce@gmail.com>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
27 #include <gst/base/gstcollectpads.h>
28 #include <gst/video/video.h>
37 #include "gstglmixer.h"
39 #if GST_GL_HAVE_PLATFORM_EGL
40 #include <gst/gl/egl/gsteglimagememory.h>
43 #define gst_gl_mixer_parent_class parent_class
44 G_DEFINE_ABSTRACT_TYPE (GstGLMixer, gst_gl_mixer, GST_TYPE_VIDEO_AGGREGATOR);
45 static gboolean gst_gl_mixer_do_bufferpool (GstGLMixer * mix,
49 #define GST_CAT_DEFAULT gst_gl_mixer_debug
50 GST_DEBUG_CATEGORY (gst_gl_mixer_debug);
52 static void gst_gl_mixer_pad_get_property (GObject * object, guint prop_id,
53 GValue * value, GParamSpec * pspec);
54 static void gst_gl_mixer_pad_set_property (GObject * object, guint prop_id,
55 const GValue * value, GParamSpec * pspec);
56 static void gst_gl_mixer_pad_finalize (GObject * object);
57 static GstBuffer *_default_pad_upload_buffer (GstGLMixer * mix,
58 GstGLMixerFrameData * frame, GstBuffer * buffer);
60 static void gst_gl_mixer_set_context (GstElement * element,
61 GstContext * context);
68 #define GST_GL_MIXER_GET_PRIVATE(obj) \
69 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_GL_MIXER, GstGLMixerPrivate))
71 struct _GstGLMixerPrivate
77 GstAllocator *allocator;
78 GstAllocationParams params;
81 gboolean gl_resource_ready;
82 GMutex gl_resource_lock;
83 GCond gl_resource_cond;
86 G_DEFINE_TYPE (GstGLMixerPad, gst_gl_mixer_pad, GST_TYPE_VIDEO_AGGREGATOR_PAD);
89 gst_gl_mixer_pad_class_init (GstGLMixerPadClass * klass)
91 GObjectClass *gobject_class = (GObjectClass *) klass;
92 GstVideoAggregatorPadClass *vaggpad_class =
93 (GstVideoAggregatorPadClass *) klass;
95 gobject_class->set_property = gst_gl_mixer_pad_set_property;
96 gobject_class->get_property = gst_gl_mixer_pad_get_property;
98 gobject_class->finalize = gst_gl_mixer_pad_finalize;
100 vaggpad_class->set_info = NULL;
101 vaggpad_class->prepare_frame = NULL;
102 vaggpad_class->clean_frame = NULL;
104 klass->upload_buffer = _default_pad_upload_buffer;
108 gst_gl_mixer_pad_finalize (GObject * object)
110 GstGLMixerPad *pad = GST_GL_MIXER_PAD (object);
113 gst_object_unref (pad->upload);
117 G_OBJECT_CLASS (gst_gl_mixer_pad_parent_class)->finalize (object);
121 _init_upload (GstGLMixer * mix, GstGLMixerPad * pad)
123 GstVideoAggregatorPad *vaggpad = GST_VIDEO_AGGREGATOR_PAD (pad);
126 GstCaps *in_caps = gst_pad_get_current_caps (GST_PAD (pad));
127 GstCaps *upload_caps = gst_caps_copy (in_caps);
128 GstCapsFeatures *gl_features =
129 gst_caps_features_from_string (GST_CAPS_FEATURE_MEMORY_GL_MEMORY);
131 pad->upload = gst_gl_upload_new (mix->context);
133 gst_caps_set_features (upload_caps, 0,
134 gst_caps_features_copy (gl_features));
135 gst_gl_upload_set_caps (pad->upload, in_caps, upload_caps);
136 gst_caps_unref (in_caps);
139 GstVideoInfo gl_info;
142 gst_video_info_set_format (&gl_info,
143 GST_VIDEO_FORMAT_RGBA,
144 GST_VIDEO_INFO_WIDTH (&vaggpad->info),
145 GST_VIDEO_INFO_HEIGHT (&vaggpad->info));
146 gl_caps = gst_video_info_to_caps (&gl_info);
147 gst_caps_set_features (gl_caps, 0, gst_caps_features_copy (gl_features));
149 pad->convert = gst_gl_color_convert_new (mix->context);
151 gst_gl_color_convert_set_caps (pad->convert, upload_caps, gl_caps);
152 gst_caps_unref (gl_caps);
155 gst_caps_unref (upload_caps);
156 gst_caps_features_free (gl_features);
161 gst_gl_mixer_pad_get_property (GObject * object, guint prop_id,
162 GValue * value, GParamSpec * pspec)
166 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
172 gst_gl_mixer_pad_set_property (GObject * object, guint prop_id,
173 const GValue * value, GParamSpec * pspec)
177 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
183 _negotiated_caps (GstVideoAggregator * vagg, GstCaps * caps)
185 GstGLMixer *mix = GST_GL_MIXER (vagg);
186 gboolean ret = gst_gl_mixer_do_bufferpool (mix, caps);
188 mix->priv->negotiated = ret;
190 gst_caps_replace (&mix->out_caps, caps);
196 gst_gl_mixer_propose_allocation (GstGLMixer * mix, GstGLMixerPad * pad,
197 GstQuery * decide_query, GstQuery * query)
199 GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
201 GstStructure *config;
205 GError *error = NULL;
207 gst_query_parse_allocation (query, &caps, &need_pool);
212 if ((pool = mix->priv->pool))
213 gst_object_ref (pool);
218 /* we had a pool, check caps */
219 GST_DEBUG_OBJECT (mix, "check existing pool caps");
220 config = gst_buffer_pool_get_config (pool);
221 gst_buffer_pool_config_get_params (config, &pcaps, &size, NULL, NULL);
223 if (!gst_caps_is_equal (caps, pcaps)) {
224 GST_DEBUG_OBJECT (mix, "pool has different caps");
225 /* different caps, we can't use this pool */
226 gst_object_unref (pool);
229 gst_structure_free (config);
232 if (!gst_gl_ensure_element_data (mix, &mix->display, &mix->other_context))
235 gst_gl_display_filter_gl_api (mix->display, mix_class->supported_gl_api);
238 mix->context = gst_gl_context_new (mix->display);
239 if (!gst_gl_context_create (mix->context, mix->other_context, &error))
243 if (pool == NULL && need_pool) {
246 if (!gst_video_info_from_caps (&info, caps))
249 GST_DEBUG_OBJECT (mix, "create new pool");
250 pool = gst_gl_buffer_pool_new (mix->context);
252 /* the normal size of a frame */
255 config = gst_buffer_pool_get_config (pool);
256 gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
257 if (!gst_buffer_pool_set_config (pool, config))
262 gst_query_add_allocation_pool (query, pool, size, 1, 0);
263 gst_object_unref (pool);
266 /* we also support various metadata */
267 if (mix->context->gl_vtable->FenceSync)
268 gst_query_add_allocation_meta (query, GST_GL_SYNC_META_API_TYPE, 0);
270 _init_upload (mix, pad);
272 gst_gl_upload_propose_allocation (pad->upload, decide_query, query);
279 GST_DEBUG_OBJECT (mix, "no caps specified");
284 GST_DEBUG_OBJECT (mix, "invalid caps specified");
289 GST_DEBUG_OBJECT (mix, "failed setting config");
294 GST_ELEMENT_ERROR (mix, RESOURCE, NOT_FOUND, ("%s", error->message),
301 gst_gl_mixer_pad_sink_acceptcaps (GstPad * pad, GstGLMixer * mix,
305 GstCaps *template_caps;
307 GST_DEBUG_OBJECT (pad, "try accept caps of %" GST_PTR_FORMAT, caps);
309 template_caps = gst_pad_get_pad_template_caps (pad);
310 template_caps = gst_caps_make_writable (template_caps);
312 ret = gst_caps_can_intersect (caps, template_caps);
313 GST_DEBUG_OBJECT (pad, "%saccepted caps %" GST_PTR_FORMAT,
314 (ret ? "" : "not "), caps);
315 gst_caps_unref (template_caps);
321 gst_gl_mixer_set_caps_features (const GstCaps * caps,
322 const gchar * feature_name)
324 GstCaps *ret = gst_gl_caps_replace_all_caps_features (caps, feature_name);
325 gst_caps_set_simple (ret, "format", G_TYPE_STRING, "RGBA", NULL);
329 /* copies the given caps */
331 gst_gl_mixer_caps_remove_format_info (GstCaps * caps)
338 res = gst_caps_new_empty ();
340 n = gst_caps_get_size (caps);
341 for (i = 0; i < n; i++) {
342 st = gst_caps_get_structure (caps, i);
343 f = gst_caps_get_features (caps, i);
345 /* If this is already expressed by the existing caps
346 * skip this structure */
347 if (i > 0 && gst_caps_is_subset_structure_full (res, st, f))
350 st = gst_structure_copy (st);
351 /* Only remove format info for the cases when we can actually convert */
352 if (!gst_caps_features_is_any (f)
353 && gst_caps_features_is_equal (f,
354 GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY))
355 gst_structure_remove_fields (st, "format", "colorimetry", "chroma-site",
357 gst_structure_remove_fields (st, "width", "height", NULL);
359 gst_caps_append_structure_full (res, st, gst_caps_features_copy (f));
366 gst_gl_mixer_update_caps (GstGLMixer * mix, GstCaps * caps)
368 GstCaps *result, *tmp, *gl_caps;
370 gl_caps = gst_caps_from_string ("video/x-raw(memory:GLMemory),format=RGBA");
373 gst_gl_color_convert_transform_caps (mix->context, GST_PAD_SRC, gl_caps,
376 GST_DEBUG_OBJECT (mix, "convert returned caps %" GST_PTR_FORMAT, tmp);
378 result = gst_gl_mixer_caps_remove_format_info (tmp);
379 gst_caps_unref (tmp);
381 GST_DEBUG_OBJECT (mix, "remove format returned caps %" GST_PTR_FORMAT, tmp);
383 result = gst_gl_upload_transform_caps (mix->context, GST_PAD_SRC, tmp, NULL);
384 gst_caps_unref (tmp);
386 GST_DEBUG_OBJECT (mix, "transfer returned caps %" GST_PTR_FORMAT, tmp);
392 gst_gl_mixer_pad_sink_getcaps (GstPad * pad, GstGLMixer * mix, GstCaps * filter)
395 GstCaps *template_caps;
396 GstCaps *filtered_caps;
397 GstCaps *returned_caps;
398 gboolean had_current_caps = TRUE;
400 template_caps = gst_pad_get_pad_template_caps (pad);
402 sinkcaps = gst_pad_get_current_caps (pad);
403 if (sinkcaps == NULL) {
404 had_current_caps = FALSE;
405 sinkcaps = template_caps;
408 gst_caps_merge (sinkcaps, gst_gl_mixer_update_caps (mix, sinkcaps));
411 filtered_caps = sinkcaps;
413 filtered_caps = gst_caps_intersect (sinkcaps, filter);
414 returned_caps = gst_caps_intersect (filtered_caps, template_caps);
417 gst_caps_unref (filtered_caps);
418 if (had_current_caps)
419 gst_caps_unref (template_caps);
421 GST_DEBUG_OBJECT (pad, "returning %" GST_PTR_FORMAT, returned_caps);
423 return returned_caps;
427 gst_gl_mixer_sink_query (GstAggregator * agg, GstAggregatorPad * bpad,
430 gboolean ret = FALSE;
431 GstGLMixer *mix = GST_GL_MIXER (agg);
432 GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
433 GstGLMixerPad *pad = GST_GL_MIXER_PAD (bpad);
435 GST_TRACE ("QUERY %" GST_PTR_FORMAT, query);
437 switch (GST_QUERY_TYPE (query)) {
440 GstCaps *filter, *caps;
442 gst_query_parse_caps (query, &filter);
443 caps = gst_gl_mixer_pad_sink_getcaps (GST_PAD (bpad), mix, filter);
444 gst_query_set_caps_result (query, caps);
445 gst_caps_unref (caps);
449 case GST_QUERY_ACCEPT_CAPS:
453 gst_query_parse_accept_caps (query, &caps);
454 ret = gst_gl_mixer_pad_sink_acceptcaps (GST_PAD (bpad), mix, caps);
455 gst_query_set_accept_caps_result (query, ret);
459 case GST_QUERY_ALLOCATION:
461 GstQuery *decide_query = NULL;
463 GST_OBJECT_LOCK (mix);
464 if (G_UNLIKELY (!mix->priv->negotiated)) {
465 GST_DEBUG_OBJECT (mix,
466 "not negotiated yet, can't answer ALLOCATION query");
467 GST_OBJECT_UNLOCK (mix);
470 if ((decide_query = mix->priv->query))
471 gst_query_ref (decide_query);
472 GST_OBJECT_UNLOCK (mix);
474 GST_DEBUG_OBJECT (mix,
475 "calling propose allocation with query %" GST_PTR_FORMAT,
478 /* pass the query to the propose_allocation vmethod if any */
479 ret = gst_gl_mixer_propose_allocation (mix, pad, decide_query, query);
482 gst_query_unref (decide_query);
484 GST_DEBUG_OBJECT (mix, "ALLOCATION ret %d, %" GST_PTR_FORMAT, ret, query);
487 case GST_QUERY_CONTEXT:
489 ret = gst_gl_handle_context_query ((GstElement *) mix, query,
490 &mix->display, &mix->other_context);
492 gst_gl_display_filter_gl_api (mix->display,
493 mix_class->supported_gl_api);
497 ret = GST_AGGREGATOR_CLASS (parent_class)->sink_query (agg, bpad, query);
505 gst_gl_mixer_pad_init (GstGLMixerPad * mixerpad)
509 /* GLMixer signals and args */
522 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
525 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
526 (GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
528 GST_VIDEO_CAPS_MAKE_WITH_FEATURES
529 (GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META,
531 "; " GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS))
534 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%u",
537 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
538 (GST_CAPS_FEATURE_MEMORY_GL_MEMORY,
540 #if GST_GL_HAVE_PLATFORM_EGL
541 GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_MEMORY_EGL_IMAGE,
544 GST_VIDEO_CAPS_MAKE_WITH_FEATURES
545 (GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META,
547 "; " GST_VIDEO_CAPS_MAKE (GST_GL_COLOR_CONVERT_FORMATS))
550 static gboolean gst_gl_mixer_src_query (GstAggregator * agg, GstQuery * query);
552 gst_gl_mixer_get_output_buffer (GstVideoAggregator * videoaggregator,
553 GstBuffer ** outbuf);
555 gst_gl_mixer_src_activate_mode (GstAggregator * aggregator, GstPadMode mode,
557 static gboolean gst_gl_mixer_stop (GstAggregator * agg);
558 static gboolean gst_gl_mixer_start (GstAggregator * agg);
561 gst_gl_mixer_aggregate_frames (GstVideoAggregator * vagg,
562 GstBuffer * outbuffer);
564 static void gst_gl_mixer_set_property (GObject * object, guint prop_id,
565 const GValue * value, GParamSpec * pspec);
566 static void gst_gl_mixer_get_property (GObject * object, guint prop_id,
567 GValue * value, GParamSpec * pspec);
569 static gboolean gst_gl_mixer_decide_allocation (GstGLMixer * mix,
571 static gboolean gst_gl_mixer_set_allocation (GstGLMixer * mix,
572 GstBufferPool * pool, GstAllocator * allocator,
573 GstAllocationParams * params, GstQuery * query);
575 static void gst_gl_mixer_finalize (GObject * object);
578 gst_gl_mixer_class_init (GstGLMixerClass * klass)
580 GObjectClass *gobject_class;
581 GstElementClass *element_class;
583 GstVideoAggregatorClass *videoaggregator_class =
584 (GstVideoAggregatorClass *) klass;
585 GstAggregatorClass *agg_class = (GstAggregatorClass *) klass;
587 GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "glmixer", 0, "opengl mixer");
589 gobject_class = (GObjectClass *) klass;
590 element_class = GST_ELEMENT_CLASS (klass);
592 g_type_class_add_private (klass, sizeof (GstGLMixerPrivate));
594 gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_gl_mixer_finalize);
596 gobject_class->get_property = gst_gl_mixer_get_property;
597 gobject_class->set_property = gst_gl_mixer_set_property;
599 gst_element_class_add_pad_template (element_class,
600 gst_static_pad_template_get (&src_factory));
601 gst_element_class_add_pad_template (element_class,
602 gst_static_pad_template_get (&sink_factory));
604 element_class->set_context = GST_DEBUG_FUNCPTR (gst_gl_mixer_set_context);
606 agg_class->sinkpads_type = GST_TYPE_GL_MIXER_PAD;
607 agg_class->sink_query = gst_gl_mixer_sink_query;
608 agg_class->src_query = gst_gl_mixer_src_query;
609 agg_class->src_activate = gst_gl_mixer_src_activate_mode;
610 agg_class->stop = gst_gl_mixer_stop;
611 agg_class->start = gst_gl_mixer_start;
613 videoaggregator_class->aggregate_frames = gst_gl_mixer_aggregate_frames;
614 videoaggregator_class->get_output_buffer = gst_gl_mixer_get_output_buffer;
615 videoaggregator_class->negotiated_caps = _negotiated_caps;
616 videoaggregator_class->find_best_format = NULL;
618 g_object_class_install_property (gobject_class, PROP_CONTEXT,
619 g_param_spec_object ("context",
621 "Get OpenGL context",
622 GST_GL_TYPE_CONTEXT, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
624 /* Register the pad class */
625 g_type_class_ref (GST_TYPE_GL_MIXER_PAD);
627 klass->set_caps = NULL;
628 klass->supported_gl_api = GST_GL_API_ANY;
632 gst_gl_mixer_reset (GstGLMixer * mix)
634 /* clean up collect data */
635 mix->priv->negotiated = FALSE;
639 gst_gl_mixer_init (GstGLMixer * mix)
641 mix->priv = GST_GL_MIXER_GET_PRIVATE (mix);
642 mix->array_buffers = 0;
645 mix->depthbuffer = 0;
647 mix->priv->gl_resource_ready = FALSE;
648 g_mutex_init (&mix->priv->gl_resource_lock);
649 g_cond_init (&mix->priv->gl_resource_cond);
650 /* initialize variables */
651 gst_gl_mixer_reset (mix);
655 gst_gl_mixer_finalize (GObject * object)
657 GstGLMixer *mix = GST_GL_MIXER (object);
658 GstGLMixerPrivate *priv = mix->priv;
660 if (mix->other_context) {
661 gst_object_unref (mix->other_context);
662 mix->other_context = NULL;
665 g_mutex_clear (&priv->gl_resource_lock);
666 g_cond_clear (&priv->gl_resource_cond);
667 G_OBJECT_CLASS (parent_class)->finalize (object);
671 gst_gl_mixer_set_context (GstElement * element, GstContext * context)
673 GstGLMixer *mix = GST_GL_MIXER (element);
674 GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
676 gst_gl_handle_set_context (element, context, &mix->display,
677 &mix->other_context);
680 gst_gl_display_filter_gl_api (mix->display, mix_class->supported_gl_api);
684 gst_gl_mixer_activate (GstGLMixer * mix, gboolean active)
686 GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
687 gboolean result = TRUE;
690 if (!gst_gl_ensure_element_data (mix, &mix->display, &mix->other_context))
693 gst_gl_display_filter_gl_api (mix->display, mix_class->supported_gl_api);
700 gst_gl_mixer_src_activate_mode (GstAggregator * aggregator, GstPadMode mode,
704 gboolean result = FALSE;
706 mix = GST_GL_MIXER (aggregator);
709 case GST_PAD_MODE_PUSH:
710 case GST_PAD_MODE_PULL:
711 result = gst_gl_mixer_activate (mix, active);
721 gst_gl_mixer_query_caps (GstPad * pad, GstAggregator * agg, GstQuery * query)
723 GstGLMixer *mix = GST_GL_MIXER (agg);
724 GstCaps *filter, *current_caps, *retcaps, *gl_caps;
726 gst_query_parse_caps (query, &filter);
728 current_caps = gst_pad_get_current_caps (pad);
729 if (current_caps == NULL)
730 current_caps = gst_pad_get_pad_template_caps (agg->srcpad);
732 /* convert from current caps to GLMemory caps */
734 gst_caps_merge (gst_gl_mixer_set_caps_features
735 (current_caps, GST_CAPS_FEATURE_MEMORY_GL_MEMORY),
736 gst_gl_mixer_set_caps_features (current_caps,
737 GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META));
739 gst_gl_download_transform_caps (mix->context, GST_PAD_SINK, current_caps,
741 retcaps = gst_caps_merge (gl_caps, retcaps);
742 gst_caps_unref (current_caps);
743 current_caps = retcaps;
745 retcaps = gst_gl_mixer_caps_remove_format_info (current_caps);
746 gst_caps_unref (current_caps);
750 gst_caps_intersect_full (filter, retcaps, GST_CAPS_INTERSECT_FIRST);
751 gst_caps_unref (retcaps);
752 retcaps = current_caps;
755 gst_query_set_caps_result (query, retcaps);
756 gst_caps_unref (retcaps);
762 gst_gl_mixer_src_query (GstAggregator * agg, GstQuery * query)
764 gboolean res = FALSE;
765 GstGLMixer *mix = GST_GL_MIXER (agg);
766 GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
768 switch (GST_QUERY_TYPE (query)) {
769 case GST_QUERY_CONTEXT:
771 res = gst_gl_handle_context_query ((GstElement *) mix, query,
772 &mix->display, &mix->other_context);
774 gst_gl_display_filter_gl_api (mix->display,
775 mix_class->supported_gl_api);
779 res = gst_gl_mixer_query_caps (agg->srcpad, agg, query);
782 res = GST_AGGREGATOR_CLASS (parent_class)->src_query (agg, query);
790 gst_gl_mixer_get_output_buffer (GstVideoAggregator * videoaggregator,
793 GstGLMixer *mix = GST_GL_MIXER (videoaggregator);
795 if (!mix->priv->pool_active) {
796 if (!gst_buffer_pool_set_active (mix->priv->pool, TRUE)) {
797 GST_ELEMENT_ERROR (mix, RESOURCE, SETTINGS,
798 ("failed to activate bufferpool"), ("failed to activate bufferpool"));
799 return GST_FLOW_ERROR;
801 mix->priv->pool_active = TRUE;
804 return gst_buffer_pool_acquire_buffer (mix->priv->pool, outbuf, NULL);
808 gst_gl_mixer_decide_allocation (GstGLMixer * mix, GstQuery * query)
810 GstGLMixerClass *mixer_class = GST_GL_MIXER_GET_CLASS (mix);
811 GstBufferPool *pool = NULL;
812 GstStructure *config;
814 guint min, max, size;
815 gboolean update_pool;
816 GError *error = NULL;
818 guint out_width, out_height;
819 GstGLContext *other_context = NULL;
820 GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (mix);
821 gboolean same_downstream_gl_context = FALSE;
823 if (!gst_gl_ensure_element_data (mix, &mix->display, &mix->other_context))
826 gst_gl_display_filter_gl_api (mix->display, mixer_class->supported_gl_api);
828 if (gst_query_find_allocation_meta (query,
829 GST_VIDEO_GL_TEXTURE_UPLOAD_META_API_TYPE, &idx)) {
830 GstGLContext *context;
831 const GstStructure *upload_meta_params;
836 gst_query_parse_nth_allocation_meta (query, idx, &upload_meta_params);
837 if (upload_meta_params) {
838 if (gst_structure_get (upload_meta_params, "gst.gl.GstGLContext",
839 GST_GL_TYPE_CONTEXT, &context, NULL) && context) {
840 GstGLContext *old = mix->context;
842 mix->context = context;
844 gst_object_unref (old);
845 same_downstream_gl_context = TRUE;
846 } else if (gst_structure_get (upload_meta_params, "gst.gl.context.handle",
847 G_TYPE_POINTER, &handle, "gst.gl.context.type", G_TYPE_STRING,
848 &type, "gst.gl.context.apis", G_TYPE_STRING, &apis, NULL)
850 GstGLPlatform platform;
853 GST_DEBUG ("got GL context handle 0x%p with type %s and apis %s",
856 platform = gst_gl_platform_from_string (type);
857 gl_apis = gst_gl_api_from_string (apis);
859 if (gl_apis && platform)
861 gst_gl_context_new_wrapped (mix->display, (guintptr) handle,
867 if (mix->other_context) {
868 if (!other_context) {
869 other_context = mix->other_context;
871 GST_ELEMENT_WARNING (mix, LIBRARY, SETTINGS,
872 ("%s", "Cannot share with more than one GL context"),
873 ("%s", "Cannot share with more than one GL context"));
878 mix->context = gst_gl_context_new (mix->display);
879 if (!gst_gl_context_create (mix->context, other_context, &error))
883 out_width = GST_VIDEO_INFO_WIDTH (&vagg->info);
884 out_height = GST_VIDEO_INFO_HEIGHT (&vagg->info);
886 g_mutex_lock (&mix->priv->gl_resource_lock);
887 mix->priv->gl_resource_ready = FALSE;
889 gst_gl_context_del_fbo (mix->context, mix->fbo, mix->depthbuffer);
891 mix->depthbuffer = 0;
894 if (!gst_gl_context_gen_fbo (mix->context, out_width, out_height,
895 &mix->fbo, &mix->depthbuffer)) {
896 g_cond_signal (&mix->priv->gl_resource_cond);
897 g_mutex_unlock (&mix->priv->gl_resource_lock);
902 gst_gl_context_del_texture (mix->context, &mix->out_tex_id);
903 gst_gl_context_gen_texture (mix->context, &mix->out_tex_id,
904 GST_VIDEO_FORMAT_RGBA, out_width, out_height);
906 gst_query_parse_allocation (query, &caps, NULL);
908 if (mixer_class->set_caps)
909 mixer_class->set_caps (mix, caps);
911 mix->priv->gl_resource_ready = TRUE;
912 g_cond_signal (&mix->priv->gl_resource_cond);
913 g_mutex_unlock (&mix->priv->gl_resource_lock);
915 if (gst_query_get_n_allocation_pools (query) > 0) {
916 gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
922 gst_video_info_init (&vinfo);
923 gst_video_info_from_caps (&vinfo, caps);
929 if (!pool || (!same_downstream_gl_context
930 && gst_query_find_allocation_meta (query, GST_GL_SYNC_META_API_TYPE,
932 && !gst_buffer_pool_has_option (pool,
933 GST_BUFFER_POOL_OPTION_GL_SYNC_META))) {
934 /* can't use this pool */
936 gst_object_unref (pool);
937 pool = gst_gl_buffer_pool_new (mix->context);
939 config = gst_buffer_pool_get_config (pool);
941 gst_buffer_pool_config_set_params (config, caps, size, min, max);
942 gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META);
943 if (gst_query_find_allocation_meta (query, GST_GL_SYNC_META_API_TYPE, NULL))
944 gst_buffer_pool_config_add_option (config,
945 GST_BUFFER_POOL_OPTION_GL_SYNC_META);
946 gst_buffer_pool_config_add_option (config,
947 GST_BUFFER_POOL_OPTION_VIDEO_GL_TEXTURE_UPLOAD_META);
949 gst_buffer_pool_set_config (pool, config);
952 gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
954 gst_query_add_allocation_pool (query, pool, size, min, max);
956 gst_object_unref (pool);
962 GST_ELEMENT_ERROR (mix, RESOURCE, NOT_FOUND, ("%s", error->message),
968 /* takes ownership of the pool, allocator and query */
970 gst_gl_mixer_set_allocation (GstGLMixer * mix,
971 GstBufferPool * pool, GstAllocator * allocator,
972 GstAllocationParams * params, GstQuery * query)
974 GstAllocator *oldalloc;
975 GstBufferPool *oldpool;
977 GstGLMixerPrivate *priv = mix->priv;
979 GST_DEBUG ("storing allocation query");
981 GST_OBJECT_LOCK (mix);
982 oldpool = priv->pool;
984 priv->pool_active = FALSE;
986 oldalloc = priv->allocator;
987 priv->allocator = allocator;
989 oldquery = priv->query;
993 priv->params = *params;
995 gst_allocation_params_init (&priv->params);
996 GST_OBJECT_UNLOCK (mix);
999 GST_DEBUG_OBJECT (mix, "deactivating old pool %p", oldpool);
1000 gst_buffer_pool_set_active (oldpool, FALSE);
1001 gst_object_unref (oldpool);
1004 gst_object_unref (oldalloc);
1007 gst_query_unref (oldquery);
1013 gst_gl_mixer_do_bufferpool (GstGLMixer * mix, GstCaps * outcaps)
1016 gboolean result = TRUE;
1017 GstBufferPool *pool = NULL;
1018 GstAllocator *allocator;
1019 GstAllocationParams params;
1020 GstAggregator *agg = GST_AGGREGATOR (mix);
1022 /* find a pool for the negotiated caps now */
1023 GST_DEBUG_OBJECT (mix, "doing allocation query");
1024 query = gst_query_new_allocation (outcaps, TRUE);
1025 if (!gst_pad_peer_query (agg->srcpad, query)) {
1026 /* not a problem, just debug a little */
1027 GST_DEBUG_OBJECT (mix, "peer ALLOCATION query failed");
1030 GST_DEBUG_OBJECT (mix, "calling decide_allocation");
1031 result = gst_gl_mixer_decide_allocation (mix, query);
1033 GST_DEBUG_OBJECT (mix, "ALLOCATION (%d) params: %" GST_PTR_FORMAT, result,
1037 goto no_decide_allocation;
1039 /* we got configuration from our peer or the decide_allocation method,
1041 if (gst_query_get_n_allocation_params (query) > 0) {
1042 gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
1045 gst_allocation_params_init (¶ms);
1048 if (gst_query_get_n_allocation_pools (query) > 0)
1049 gst_query_parse_nth_allocation_pool (query, 0, &pool, NULL, NULL, NULL);
1052 result = gst_gl_mixer_set_allocation (mix, pool, allocator, ¶ms, query);
1057 no_decide_allocation:
1059 GST_WARNING_OBJECT (mix, "Failed to decide allocation");
1060 gst_query_unref (query);
1067 _default_pad_upload_buffer (GstGLMixer * mix, GstGLMixerFrameData * frame,
1070 GstVideoAggregatorPad *vaggpad = GST_VIDEO_AGGREGATOR_PAD (frame->pad);
1071 GstGLMixerPad *pad = frame->pad;
1072 GstBuffer *uploaded_buf, *gl_buffer;
1073 GstVideoInfo gl_info;
1074 GstVideoFrame gl_frame;
1075 GstGLSyncMeta *sync_meta;
1077 gst_video_info_set_format (&gl_info,
1078 GST_VIDEO_FORMAT_RGBA,
1079 GST_VIDEO_INFO_WIDTH (&vaggpad->info),
1080 GST_VIDEO_INFO_HEIGHT (&vaggpad->info));
1082 _init_upload (mix, pad);
1084 sync_meta = gst_buffer_get_gl_sync_meta (vaggpad->buffer);
1086 gst_gl_sync_meta_wait (sync_meta);
1088 if (gst_gl_upload_perform_with_buffer (pad->upload,
1089 vaggpad->buffer, &uploaded_buf) != GST_GL_UPLOAD_DONE) {
1093 if (!(gl_buffer = gst_gl_color_convert_perform (pad->convert, uploaded_buf))) {
1094 gst_buffer_unref (uploaded_buf);
1098 if (!gst_video_frame_map (&gl_frame, &gl_info, gl_buffer,
1099 GST_MAP_READ | GST_MAP_GL)) {
1100 gst_buffer_unref (uploaded_buf);
1101 gst_buffer_unref (gl_buffer);
1105 frame->texture = *(guint *) gl_frame.data[0];
1107 gst_buffer_unref (uploaded_buf);
1108 gst_video_frame_unmap (&gl_frame);
1114 gst_gl_mixer_process_textures (GstGLMixer * mix, GstBuffer * outbuf)
1118 guint out_tex, out_tex_target;
1119 gboolean res = TRUE;
1120 guint array_index = 0;
1121 GstVideoFrame out_frame;
1122 GstElement *element = GST_ELEMENT (mix);
1123 GstVideoAggregator *vagg = GST_VIDEO_AGGREGATOR (mix);
1124 GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
1125 GstGLMixerPrivate *priv = mix->priv;
1126 gboolean to_download =
1127 gst_caps_features_is_equal (GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY,
1128 gst_caps_get_features (mix->out_caps, 0));
1129 GstMapFlags out_map_flags = GST_MAP_WRITE;
1131 GST_TRACE ("Processing buffers");
1133 to_download |= !gst_is_gl_memory (gst_buffer_peek_memory (outbuf, 0));
1136 out_map_flags |= GST_MAP_GL;
1138 if (!gst_video_frame_map (&out_frame, &vagg->info, outbuf, out_map_flags)) {
1143 out_tex = *(guint *) out_frame.data[0];
1145 ((GstGLMemory *) gst_buffer_peek_memory (outbuf, 0))->tex_target;
1147 GST_INFO ("Output Buffer does not contain correct memory, "
1148 "attempting to wrap for download");
1151 mix->download = gst_gl_download_new (mix->context);
1153 gst_gl_download_set_format (mix->download, &out_frame.info);
1154 out_tex = mix->out_tex_id;
1155 out_tex_target = GL_TEXTURE_2D;
1158 GST_OBJECT_LOCK (mix);
1159 walk = element->sinkpads;
1161 i = mix->frames->len;
1162 g_ptr_array_set_size (mix->frames, element->numsinkpads);
1163 for (; i < element->numsinkpads; i++)
1164 mix->frames->pdata[i] = g_slice_new0 (GstGLMixerFrameData);
1166 GstGLMixerPad *pad = GST_GL_MIXER_PAD (walk->data);
1167 GstGLMixerPadClass *pad_class = GST_GL_MIXER_PAD_GET_CLASS (pad);
1168 GstVideoAggregatorPad *vaggpad = walk->data;
1169 GstGLMixerFrameData *frame;
1171 frame = g_ptr_array_index (mix->frames, array_index);
1175 walk = g_list_next (walk);
1177 if (vaggpad->buffer != NULL) {
1178 g_assert (pad_class->upload_buffer);
1181 gst_buffer_unref (pad->gl_buffer);
1182 pad->gl_buffer = pad_class->upload_buffer (mix, frame, vaggpad->buffer);
1184 GST_DEBUG_OBJECT (pad,
1185 "uploaded buffer %" GST_PTR_FORMAT " from buffer %" GST_PTR_FORMAT,
1186 pad->gl_buffer, vaggpad->buffer);
1192 g_mutex_lock (&priv->gl_resource_lock);
1193 if (!priv->gl_resource_ready)
1194 g_cond_wait (&priv->gl_resource_cond, &priv->gl_resource_lock);
1196 if (!priv->gl_resource_ready) {
1197 g_mutex_unlock (&priv->gl_resource_lock);
1198 GST_ERROR_OBJECT (mix,
1199 "fbo used to render can't be created, do not run process_textures");
1204 mix_class->process_textures (mix, mix->frames, out_tex);
1206 g_mutex_unlock (&priv->gl_resource_lock);
1209 if (!gst_gl_download_perform_with_data (mix->download,
1210 out_tex, out_tex_target, out_frame.data)) {
1211 GST_ELEMENT_ERROR (mix, RESOURCE, NOT_FOUND, ("%s",
1212 "Failed to download video frame"), (NULL));
1220 walk = GST_ELEMENT (mix)->sinkpads;
1222 GstGLMixerPad *pad = GST_GL_MIXER_PAD (walk->data);
1225 gst_gl_upload_release_buffer (pad->upload);
1227 walk = g_list_next (walk);
1230 GST_OBJECT_UNLOCK (mix);
1232 gst_video_frame_unmap (&out_frame);
1238 gst_gl_mixer_process_buffers (GstGLMixer * mix, GstBuffer * outbuf)
1241 guint i, array_index = 0;
1242 GstElement *element = GST_ELEMENT (mix);
1243 GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (mix);
1245 GST_OBJECT_LOCK (mix);
1246 walk = GST_ELEMENT (mix)->sinkpads;
1247 i = mix->frames->len;
1248 g_ptr_array_set_size (mix->frames, element->numsinkpads);
1249 for (; i < element->numsinkpads; i++)
1250 mix->frames->pdata[i] = g_slice_new0 (GstGLMixerFrameData);
1251 while (walk) { /* We walk with this list because it's ordered */
1252 GstVideoAggregatorPad *vaggpad = walk->data;
1254 walk = g_list_next (walk);
1256 if (vaggpad->buffer != NULL) {
1257 /* put buffer into array */
1258 mix->array_buffers->pdata[array_index] = vaggpad->buffer;
1262 GST_OBJECT_UNLOCK (mix);
1264 return mix_class->process_buffers (mix, mix->array_buffers, outbuf);
1269 static GstFlowReturn
1270 gst_gl_mixer_aggregate_frames (GstVideoAggregator * vagg, GstBuffer * outbuf)
1272 gboolean res = FALSE;
1273 GstGLMixer *mix = GST_GL_MIXER (vagg);
1274 GstGLMixerClass *mix_class = GST_GL_MIXER_GET_CLASS (vagg);
1275 GstGLSyncMeta *sync_meta;
1277 if (mix_class->process_buffers)
1278 res = gst_gl_mixer_process_buffers (mix, outbuf);
1279 else if (mix_class->process_textures)
1280 res = gst_gl_mixer_process_textures (mix, outbuf);
1282 sync_meta = gst_buffer_get_gl_sync_meta (outbuf);
1284 gst_gl_sync_meta_set_sync_point (sync_meta, mix->context);
1286 return res ? GST_FLOW_OK : GST_FLOW_ERROR;
1290 gst_gl_mixer_get_property (GObject * object,
1291 guint prop_id, GValue * value, GParamSpec * pspec)
1293 GstGLMixer *mixer = GST_GL_MIXER (object);
1297 g_value_set_object (value, mixer->context);
1300 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1306 gst_gl_mixer_set_property (GObject * object,
1307 guint prop_id, const GValue * value, GParamSpec * pspec)
1311 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1317 _clean_upload (GstAggregator * agg, GstAggregatorPad * aggpad, gpointer udata)
1319 GstGLMixerPad *pad = GST_GL_MIXER_PAD (aggpad);
1321 if (pad->gl_buffer) {
1322 gst_buffer_unref (pad->gl_buffer);
1323 pad->gl_buffer = NULL;
1327 gst_object_unref (pad->upload);
1332 gst_object_unref (pad->convert);
1333 pad->convert = NULL;
1340 _free_glmixer_frame_data (GstGLMixerFrameData * frame)
1342 g_slice_free1 (sizeof (GstGLMixerFrameData), frame);
1346 gst_gl_mixer_start (GstAggregator * agg)
1349 GstGLMixer *mix = GST_GL_MIXER (agg);
1350 GstElement *element = GST_ELEMENT (agg);
1352 GST_OBJECT_LOCK (mix);
1353 mix->array_buffers = g_ptr_array_new_full (element->numsinkpads,
1354 (GDestroyNotify) _free_glmixer_frame_data);
1355 mix->frames = g_ptr_array_new_full (element->numsinkpads, NULL);
1357 g_ptr_array_set_size (mix->array_buffers, element->numsinkpads);
1358 g_ptr_array_set_size (mix->frames, element->numsinkpads);
1360 for (i = 0; i < element->numsinkpads; i++)
1361 mix->frames->pdata[i] = g_slice_new0 (GstGLMixerFrameData);
1363 GST_OBJECT_UNLOCK (mix);
1369 gst_gl_mixer_stop (GstAggregator * agg)
1371 GstGLMixer *mix = GST_GL_MIXER (agg);
1372 GstGLMixerClass *mixer_class = GST_GL_MIXER_GET_CLASS (mix);
1374 GST_OBJECT_LOCK (agg);
1375 g_ptr_array_free (mix->frames, TRUE);
1377 g_ptr_array_free (mix->array_buffers, TRUE);
1378 mix->array_buffers = NULL;
1379 GST_OBJECT_UNLOCK (agg);
1381 if (mixer_class->reset)
1382 mixer_class->reset (mix);
1384 gst_gl_context_del_fbo (mix->context, mix->fbo, mix->depthbuffer);
1386 mix->depthbuffer = 0;
1388 if (mix->download) {
1389 gst_object_unref (mix->download);
1390 mix->download = NULL;
1393 gst_aggregator_iterate_sinkpads (GST_AGGREGATOR (mix), _clean_upload, NULL);
1395 if (mix->priv->query) {
1396 gst_query_unref (mix->priv->query);
1397 mix->priv->query = NULL;
1400 if (mix->priv->pool) {
1401 gst_object_unref (mix->priv->pool);
1402 mix->priv->pool = NULL;
1406 gst_object_unref (mix->display);
1407 mix->display = NULL;
1411 gst_object_unref (mix->context);
1412 mix->context = NULL;
1415 gst_gl_mixer_reset (mix);